Chair



March s, 1932.

.l` A. GARROW CHAIR Filed Aug. 3l, 1928 llllllll lllllrilwll WW www d GA. m m

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Patented Mar. 8, 1932; i'

u i @mcsi v .l JAMES A. GARnow, fQrfs'r. rieur.. MINNESOTA, Assienoa`'ro 'THE FRITZ-CROSS y coMPANmoF sr. PAUL,Y M1N1vnsorA,.A CORPORATION orivrnmnsorn Vemma 5 Applicationled August 31, 1928. Serial No.v303,143.'v

My invention relatesto chairs `and has for its object to provide a chairincluding a back -rest which is adapted to be readily and convenientlyadjusted to tthe back of the user so as to insure correct posture andcomfort. n

, Another k.object of the inventionresides in I constructing achairwitha seat and in pivot- Y si'desin attaching to'said--uprights plateshav-20 ally connecting to the rearward portion of the seat a pairgofpuprights and to further provide adjustable braces. for holding saiduprights iny adjustable position. 'f

*A still vfurther objectV ofY he invention re? sides in pivotallyattaching totheupper-portion ofV said uprights a pair of forwardly eX-ytending members adapted to swing inavertical direction and in attachingto kbers aback rest.

A still `further object of the inventionlre- A'said 'meming segmentalshapedslots concentrically disposed relative toV thei .pivotsv of saidmembers and kin -f `further providing bolts extending through said slotsand members for holding `saidvmeinbers in adjusted position. A -eatureofthe invention resides in'pivotally mounting said back rest upon saidmembers.' v

Otherobjectso the invention yres-ide in the novel combination andarrangement of parts i and in the details of constructionhereinafterdescribed and claimed. Y

In` the Vdrawings :v

- Fig. 1 is a perspective view of a chairillus- Vtrating an embodimentof my invention. y f

Fig. 2 afragmentarydetail-view of the back rest supporting structure.

Figa 3j isa longitudinal sectional yview of the seatsupporting"structure of the invention.V V

, Fig. 4EV is a sectional view: taken on Kline'A f P- 1 of Fig.1 2 anddrawn to a vlarger scale.

[Inrprior types of adjustable chairsiconsiderable disadvantage arisesfrom the fact that y sufficient verticaladjustmentcannot beprocured-without y,causing the supporting struc.

-tached toV the seat supporting structure B ina manner best shown inFig. 3. The uptures of the chair to extendoutwardly beyond j the seatorback rest portion in a protrusive manner.' My invention overcomes thisVdisadvantage providlng a, chair in*` which the back rest may be quicklyand positivelyl ad. 50" l i justed to 4adapt itselflto'v'arioususers andin which the supporting structurefthereiore ried by a seat supportindicated in its entirety n n at B together with aback restC. TheV seatA comprises a rectangular ra1ne`10- constructed yof bar metal'and formedwith sides 11 and front and rear portions' 12 which' are -50 v welded orrivetedtogether to form a unitary construction. Across theftop of thisframe are attached two 'U bars 13and14;` whichare rivetedto the lfrontand back12 through the agency of ears 15 formed thereon. Upon the twobars 13'and 14 and the frame 10 is sup-f. ported a cushion 16 which maybe of any su'it-y V'able"construction randv which may be attached to thebars y13y and 14 by screwsor. which may be secured thereto inany othersuitable mane ner.

VThe seatv A is supportedk uponvastandard 17 which is f-.jpreferablyconstructedv of a cylindrical krod and which isV swivellyk atper end 18of`V this rod is turned down to form a shoulder 19 and is mounted in alongitudinal `boreA 20 formed inV al f casting 21.

I.'Ifhiscasting isgpreferably securedfto the kS0 .Ai'rameinemberV 10 bybars y22 {which Vare bolted tothe said vcasting byboltsv2ll andwhichisbolted or otherwise .n secured tosaid frame members.- Forholding; the standard 17 iny p1acefwithinthe" casting 21 theex-f tremelend of the saine as indicated at23fis riveted .over the castingy `21which serves `to Y firmly attach saidstandard to the seatstructure. 'Theseat supporting structure B includes a crown block 26 which ispreferably in the form of a casting provided with a central bore 27 anda plurality of circumferentially arranged bores 28 symmetricallydisposed about the bore 27. The standard 29 is slidably mounted in thebore 27 and is adjustreceived within an enlargement 46 of the :bore 27.The Crown block 26 is constructed -with an upwardly facingV seat'47which enably held supported therein by a device to be presentlydescribed while a plurality of outwardly extending tubular legs 29, 301,

31 and 32 are mounted in the bores 28. It

vcrown block so as to hold the tubular le s 29, 30, 31 and 32 fromprojecting throng the same and to provide a cap for obscuring the upperends thereof. These legs are se-y cured ywithin the bores 28 by means ofscrews 34 or in any other suitable'manner and are curved or bent so asto bring the extreme ends thereof outwardly fromV the crown block 26 soas to support the seat A n a stable manner. legs may be attached casters33 of any suitable size or design.

For swivelly mounting the seat A relative to the supporting structure BI employ a collar which encircles the standard 38 and is attached.thereto in a manner to be presently described and which is adapted to begages with a shoulder 48 on the lowermost ortion of Collar 45 andformsan end thrust eating therefor, A screw 49 threaded into the crown block26 enters an annular recess formed upon the exterior of the collar 45and .serves to hold this collar from removal from the crown block 26, Atthe same time the said collar is free to rotate` sopas to perymit theseat A to swivel relative to the supporting structure B.

The locking device for holding the standard 17 in adjustedy positionrelative to the crown block 26 is shown in detail on 3. This deviceconsistsfof a lock bolt 35 provided With astem 36 of reduced diameterconnected therewith and having a knurled head 37 secured to the end ofthe same. This lock pin is slidably mounted in a tubular boss 38 whichis constructed with a longitu-k dnal bore 39 of such a diameter as toreceive thesaid bolt 35 and to permit of free longitudinal movementthereof. The outer vend f of the boss138 is threaded as indicated at 404to receive a bushingi41 which is formed with ahead 42'by means of whichthey same may be screwed into said boss and which is drilled to forni a.guide for slidably support- To the ends of these` serves to normallyforce the said lock bolt toward the standard 17 where the same mayengage any of a number of recesses 44 formed therein for supporting thesaid standard in vertically adjusted position.'

The back rest C is carried upon a back rest support which is constructedfrom a single bar of metal formed with a pair of spaced uprights 52 and53 and a bridge member 54 connecting the same at their upper ends toform an inverted U-shaped fromm The uprights 52 and 53 are pivoted tothe frame 10 at the rearward portion thereof by means of two rivets 55which pass through said uprights andthe frame members 11. These uprightsare further supported by means of two braces 56 and 57 which are pivotedto said uprights intermediate the ends thereof by means of rivets 58 asbest shown in Fig. L These braces are preferably curved as shown toyoffer as little obstructionV as possible to the free movement of theoccupant. Alon the forward portions ofthe frame mem rs 11 are formedserratedy slots 59 which are adapted vto receive bolts 60 paesingthrough the forward ends of the braces 56. By means of these slots thebraces 56 fmay be positioned with the bolts 60 thereof ldisposed. in anyof the serrations of said suitable manner and consists preferably of asuitable cushion 61 which has attached to it two brackets62 and 63.These brackets are formed with flanges 64 byvmeans of which the same maybe attached to the back of the back rest C.. Upon the inner surfaces ofthe luprights 52 and 53 and immediately adjavslots 67 of quadrant 66,bar 69 and bracket 62. Wing nuts 73 on each of these bolts serve toclamp the parts together so as to hold the said hars in adjustedposition relative to said quadrants. By means of this construction theheight of the back rest C relative to seat Ay may be readilyadiusted bymerely swinging the bars 69 and 70 upon their pivots and subsequentlytightening the wing nuts 7 3 for holding the same in place. l

Tn addition to adjustably supporting the back rest C in both horizontaland vertical 'direction the same is adapted to be pivoted 'in' suchVa'manner as to readily conform to The vback rest C may be constructed inany the contour ofthe back of the occupant af-v )13 .pearance to thechair.'A Vrihe raising and low p v1,848,338 fter the bars, 69 and 70have been secured in adjusted position. This is accomplishedy byrotatably supporting ythe 'brackets 62 Vand 63 upon the bolts '7l and72. These bolts being identical, the construction kof bolt Z2 is" shownin detail in Fig.y 4. As will be noted the shank of said bolt adjacentthe head 74 which I have indicated at 75, is somewhat enlarged withrespect to the major portion of the shank thereof. This enlarged portionpasses throughthe bracket 62 and is of a length slightly greater thanthe thickness of said bracket. A shoulder L76v formed by means of thisenlargement 7 5 bears against the bar 69 and servesto clamp said barrelative to thequadrant 66, at-the same time permitting the bracket 62to revolve relative to said bolt. A spring washer 77 rdisposed betweenthe head 74 of thisbolt and the bracket 72 provides sucient friction tohold the back rest A in adjusted position, vthereby preventing the samefrom accidentally falling orloosening its desiredpivotal adjust ment.V y

In the use of the chair the standard 17 is first adjusted to seat theoccupant at a proper height relative tothe floor sothat the occu- Vpantsfeet rest firmly upon the door and in a natural position when theoccupant is properly seated. rlhe height of the back rest 1 C is thenregulated by yadjusting the'bolts 71 and 72 so that the said back restreaches the occupant slightly above the small of the back. By nextadjusting the ends of the braces 56 and 57 the said back rest can beadjusted lat-V erally so as to just reach the occupants back when theoccupants legs come up to the forward portion of the cushion l-which'asnoted in Figl, is generously'curvedtoprevent discomfort to the user.Vhen in Vsuch position the body of the occupant is free along theforward and rearward portionsof the chairk j due to the fact that the`upright-s 52 and, 53

are spaced from one another at these points i the entire width of thechair. At the same 'time the curvature of the `brace 56 preventsinterfere-nce with the movements ofthe arms be supported in such a*manner as to prevent mental and physical fatigue and results inincreased. etticiency and better health. A

greaterdegree of adjustment may be hadA with my chair than is possiblewith other chairs having adjustable back rests without causing thesupporting structure to protrude ,outwardly beyondthe back rest andseatin such a manner asto give an oensive ap,

ering of the backrest can be independently accomplished so that eachadjustmentcan be in the scope otwhat isclaimed without departing `from*the spirit of my invention.v

Having described'my invention, what l claim as lnew and desire toprotect-by Let-V ters Patent is 1. A chaircomprising a seat,uprightsextending upwardly vfrom said seat and pivoted at their lower endsitothe rearward portion of said'seat, means forholding said uprights inadjusted position,fplates attached to saidl ing through said membersVand segmental,

slots for locking said members in adjusted position relative to saiduprights,and a back rest swingably mounted on said bolts. i

2., A chair comprising `a seat, a. frame including an upright extendingupwardly from saidseat, a plate attached tosaidA upright,

said plate having aosegmental slot, a member pivoted to said frame atthe center of curva` ture of said solt, a bolt passing through saidmember and segmental slot for locking said member in adjusted position`relative to said upright, and a back rest swingably mounted upon saidbolt. Y

3. A chair comprising a seat, an upright said bolt being spaced from thepivot of said member anda back rest swingably mounted on said bolt.

pivotallyv connected to said upright, means includimr an eccentric-allysituated boltfor holding said member in locked posi ion withV respect tosaid upright, and a back rest swing ably ymounted on said bolt. v

5. A chair comprising a sea-t, an upright `extending upwardly therefrom,a member pivoted to said upright, a backrest pivoted to said member atanother locality, and a single device for simultaneously locking saidmember and back rest from swinging movement.

6. A chair comprising al seat, an upright extending upwardly therefrom,a member swingable relative to saidupright about a attached to said seatand extending upwardj Y kv 4. A chair comprising ak seat, lanuprightextending upwardly therefrom, a member certain axis, a back restswingable relativev to said member about an axis spaced frompsaid firstnamed axis, and means extending jointly back rest in adjusted position.

7 A chair comprising aseat, an upright extending upwardly therefrom, amember through said upright, member and backrest for simultaneouslyholding said member-andv swingable relative tosad upright, a, back restswngble relative to said membex` and about a dferent axis, said upright,member and back nest having overlying portions formed y with registeringopenings, and means includ` ing a single memberv extending through saidopenings for simultaneously holding said member and back rest inadjusted position. In testimony whereof I have aiixed my signature 'tothis specification.

JAMES A. GARROW.

